First observation of the Charmless Decay B to K pi0pi0 and Study of its Dalitz Plot Structure Page: 90 of 201
201 pagesView a full description of this thesis or dissertation.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
4.2. Continuum background rejection
0.1
0.05nI
61
0.2 0.4 0.6 0.8 1
TFIvFigure 4.3: Absolute value of the output of the flavour tagging NN for signal
MC (blue line) and offpeak data (red line)
4.2.4 Neural Network training and output selection
The variables listed above were combined to form a NN, Fisher and Boosted Decision
Tree (BDT) discriminant trained on half the events in signal MC and offpeak data.
The output was used to compare the performance of these methods and the results
of the test is shown in Figure 4.4. The MLP exhibits marginally higher signal
efficiency to background rejection. From the distribution of the input variables,
the most powerful at discriminating between signal and continuum is the ratio of
Legendre polynomials in Figure 4.1. The distributions of these variables is seen to beBackground rejection versus Signal efficiency
c
0
C
i
(U
m1
0.8
0.7
0.6
0.5
0.4
0.3
0.2.n .r nJ rnl p r-r
MVA Method:
- -.MLPradial . --.........
- Fish-r
-BDT0.1 0.2 0.3 0.4 0.5 0.6
0
TMVA
0.7 0.8 0.9 1
Signal efficiencyFigure 4.4: Comparison of the performance of three MVAs using the same
variables. The MLP Neural Network gives the best performance for this mode.
61,.-
, i i i i i i
Upcoming Pages
Here’s what’s next.
Search Inside
This document can be searched. Note: Results may vary based on the legibility of text within the document.
Matching Search Results
View two places within this document that match your search.Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Thesis Or Dissertation.
Puccio, Eugenia Maria Teresa Irene & /SLAC, /Warwick U. First observation of the Charmless Decay B to K pi0pi0 and Study of its Dalitz Plot Structure, thesis or dissertation, March 21, 2012; United States. (https://digital.library.unt.edu/ark:/67531/metadc830373/m1/90/?q=%22Irene%22: accessed June 8, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.